24226 results about "Chain link" patented technology

The present invention belongs to the technical field of machining and punching, and in particular relates to a surface pressurized punching device for anode plate machining. The surface pressurized punching device comprises a workbench of a table structure, a machine unit mounted on one side of the workbench, and a rack welded to the table top of the workbench, wherein an operation platform is fastened to the table top of the workbench and inside the rack by means of bolts, and clamping plates which are oppositely arranged are slidably mounted on two sides of the surface of the operation platform; and a hydraulic cylinder is mounted at the center of the surface of the rack, and an output shaft of the hydraulic cylinder running into the rack is fixedly connected to a drill rod by means of a coupler. By means of providing a reaming assembly, an electric motor B is controlled by an external power supply to operate while the hydraulic cylinder drives the drill rod to move, such that the electric motor B drives, by means of a gear A and a chain, a gear B to rotate synchronously while the electric motor B moves with the drill rod by means of an outer frame, thereby driving the drill rod to rotate. Thus, the surface of the drill rod can rotationally grind and finish holes in an anode plate while the drill rod performs drilling, thereby reducing burrs.

The invention discloses a suspension conveying device and method for steel member galvanization machining, and particularly relates to the technical field of conveying equipment.The suspension conveying device for steel member galvanization machining comprises a suspension guide rail and further comprises a plurality of moving trolleys evenly distributed in the suspension guide rail to complete suspension conveying actions, and each moving trolley is connected with a guide rail chain to finish power connection. The product hanging rack is hung through the hanging mechanism, the length of the hanging mechanism can be freely adjusted, free adjustment can be completed according to different conveying heights, convenience is improved, repeated disassembly and assembly are not needed, safety protection can be completed on the hanging mechanism by arranging the protection mechanism, and the safety of the product hanging rack is improved. The safety accident of high-altitude falling is avoided, multiple locking of the winding unit can be completed under the cooperation of the gravity locking unit and the centrifugal locking unit, a product on the suspension mechanism can be rapidly locked, and safety and stability are better achieved.

A bicycle lock has a lock casing, a lock core assembly, a lock bar, and a lock cable. The lock casing has a front end surface, a back end surface, a peripheral surface, an installation slot, a fixed pin, a lock core recess, and a cable slot. The installation slot is recessed from the peripheral surface. The fixed pin is secured in the installation slot. The lock core recess is recessed from the front end surface. The lock core assembly is movably mounted in the lock core recess. The lock bar is connected to the lock core assembly and is capable of moving into the installation slot. The lock cable is detachably mounted in the cable slot of the lock casing. The bicycle lock can be fixed on a chain of a bicycle to interfere with operation of the chain, thereby preventing theft

A fitness bar system for use with exercise equipment, such as standard weights, Olympic weights, flat resistance bands, chains, tubular resistance bands, or the like, includes at least one elongated fitness bar having two opposing ends, each end being open and having an internal thread. At least one elongated cylindrical connector has two opposing ends, a threaded outside surface, and a plurality of threaded diametrical through holes each having threads. At least one adapter is fixable with the ends of each elongated fitness bar or with the ends of each of the elongated cylindrical connectors. The at least one adaptor is configured for connecting the fitness bar system with the exercise equipment. Multiple of the elongated fitness bars may be mutually connected with the elongated cylindrical connectors to form a fitness bar of several desired length.

The invention relates to a circuit breaker and a switching-on and switching-off operation power adjusting method thereof. The circuit breaker comprises a main crank arm, an opening chain, a closing lock catch device and a spring operating mechanism. The main crank arm is connected with the opening chain, and the closing lock catch device is in unlocking connection with the main crank arm. The spring operating mechanism comprises an energy storage spring, an operating power adjusting mechanism and a pressure sensor, the energy storage spring is compressed under the traction of the opening chain, and when the main crank arm is in an unlocking state, the energy storage spring can rebound and pull the opening chain so as to drive the output shaft to rotate to a theoretical opening position. The pressure sensor is connected with the energy storage spring and used for monitoring the pressure value of the energy storage spring in real time, and the operation work adjusting mechanism is connected with the energy storage spring and used for adjusting the pressure value of the energy storage spring. The operating power adjusting mechanism of the circuit breaker can timely adjust the compression amount of the energy storage spring according to the pressure value, so that the energy storage spring can be always maintained within the preset pressure range, and the opening and closing phase selection precision of the circuit breaker is improved.

The invention relates to the technical field of chain-type combined tool magazines, in particular to a row-type chain-type combined tool magazine and a tool changing method thereof.The row-type chain-type combined tool magazine comprises a translation mechanism for supporting and driving a tool changing arm mechanism to reciprocate for tool changing and a plurality of chain-type tool magazines arranged on a sliding track where the translation mechanism is located; the multiple chain type tool magazines are arranged in a row in the direction away from the main shaft and are arranged on the same side of the translation mechanism in the sliding direction with the main shaft. The axes of a plurality of tools of the chain type tool magazine are located in the same plane, and a vacant tool position is reserved on a chain of the chain type tool magazine. And the translation mechanism drives the tool changing arm mechanism to sequentially pass through the empty tool positions on the multiple chain type tool magazines to take tools from the selected chain type tool magazines. The axes of tools in the chain type tool magazines are located in the same plane, the tool changing space needed between the adjacent tool magazines is reduced, the occupied area of equipment is reduced, the moving times and distance of a tool changing arm in the tool changing process are reduced due to the empty tool position, the tool changing path is simplified, and the tool changing speed is increased.

The invention discloses an intelligent port cargo scheduling system and method based on the Internet of Things, relates to the technical field of intelligent port logistics scheduling, and realizes dynamic adaptive adjustment of a port scheduling strategy by constructing a full-chain linkage mechanism of real-time sensing, intelligent analysis, dynamic decision, accurate execution and closed-loop feedback. The system can automatically expand or contract the boundary of the storage yard buffer area according to the congestion index of the core operation area and ship tide prediction, and synchronously adjust the AGV and the yard bridge scheduling rule, in the peak tide period, the AGV preferentially guarantees the rapid transfer of cargoes in the core area, the efficiency loss caused by long-distance transportation is avoided, and the transportation efficiency is improved. In the low ebb backflow period, goods in the elastic storage area are actively moved to the core preparation area in advance, layout is conducted in advance for the follow-up operation peak, the dynamic scheduling mode can effectively cope with severe fluctuation of the port operation amount, all the operation links are kept efficient and cooperative all the time, and the adaptability and response capacity of the port in the complex operation environment are greatly improved.

A production processing device for a regenerated neodymium-iron-boron magnet, specifically relating to the technical field of magnet grinding. The device comprises two device supports (1), two rotating shafts (11) being provided between the two device supports (1); the outer surfaces of the two rotating shafts (11) are both provided with chain wheels (12), a transmission chain (13) being connected between the two chain wheels (12); a plurality of clamping mechanisms (2) arranged in an array are provided outside the transmission chain (13); the right sides of two ends, i.e. the upper and lower ends, of the device support (1) located behind are both provided with control mechanisms (3) adaptive to the clamping mechanisms, the upper end of the control mechanism (3) located above being provided with a feeding device (4); the middle portions of the upper ends of the two device supports (1) are both provided with first supporting blocks (16), grinding wheels (17) being provided at the ends of the two first supporting blocks close to each other. Using the design in which the clamping mechanisms and the control mechanisms fit each other improves the applicability in use of the production processing device for a regenerated neodymium-iron-boron magnet, and using the design in which the control mechanisms and the feeding device fit each other improves the convenience in use of said device.

The invention provides a chain saw and a cutting tool, and the chain saw comprises a working part which comprises a guide plate and a chain; the main body part comprises a shell; a motor accommodated in the housing; the driving circuit is electrically connected to the motor; a controller accommodated in the housing; the motion detection device is in associated connection with the main body part or the working part, is connected with the controller and is used for detecting the motion variation of the main body part or the working part in at least one direction; the controller is configured to control the motor to enter a braking process when the motion detection device detects that the motion variation of the main body part or the working part in at least one direction exceeds a preset condition; the chain saw is configured to be in communication connection with external equipment; the external device is at least configured for a user to set information related to a preset condition. By the adoption of the technical scheme, the chain saw with the rapid braking function can be provided.

The invention relates to the technical field of mining scraper conveyor equipment, in particular to a scraper conveyor chain breakage monitoring method and device based on machine vision. The method comprises the following steps: acquiring a real-time three-dimensional image when a chain moves through a stereo camera; obtaining real-time state data of the chain according to the real-time three-dimensional image; and comparing the real-time state data with standard data, and if the real-time state data does not meet a preset threshold value, determining that the chain has a chain breakage risk. According to the method, the real-time three-dimensional image of the chain during movement is obtained through the stereo camera, the real-time state data of the chain is obtained according to the real-time three-dimensional image, whether the chain breakage risk exists or not is determined by comparing the real-time state data with the standard data, and the chain state can be accurately monitored in real time.

A chainsaw includes a housing with a body portion and a motor portion disposed on a left or right side of the body portion, a guide plate, a chain, a drive assembly including an electric motor, a power supply device, a top handle, a side handle and a circuit board assembly. The top handle is disposed on and connected to an upper side of the body portion, and the rear portion is located below a handle rear end of the top handle. The side handle is disposed on a same side of the body portion together with the motor portion. The circuit board assembly is disposed in the rear portion of the body portion, and located between the power supply device and the drive assembly in a front and rear direction. An overall length of the chainsaw is smaller than or equal to 230 mm.

The invention relates to the technical field of steel corrugated plate hoisting, and discloses an unsupported hoisting installation system applied to a large-span arched steel corrugated plate, which comprises a lifting hook, auxiliary mechanisms are symmetrically connected below the lifting hook, and the auxiliary mechanisms are used for being connected with haunches of the steel corrugated plate so as to avoid deformation of the steel corrugated plate in the hoisting process. An adjusting mechanism which is connected with the arch crown of the steel corrugated plate and can adjust the span of the steel corrugated plate is further connected below the lifting hook through a hand-drive block, and the adjusting mechanism comprises a lifting lug. The support-free hoisting installation system applied to the large-span arched steel corrugated plate can effectively solve the problems that in the prior art, before hoisting of the steel corrugated plate, the span of the steel corrugated plate is mainly adjusted by manually and repeatedly shaking a hoist chain, climbing to the top of the steel corrugated plate for multiple times is needed for high-altitude operation, the labor intensity is large, the risk is high, and the working efficiency is high. And repeated debugging is often needed, so that the adjustment time of a single steel corrugated plate is relatively long, and the overall hoisting progress is slowed down.

The invention relates to the field of warp knitting machines, in particular to a warp knitting machine weft selecting and laying device which comprises a weft selecting unit, a weft laying unit and yarn conveying and clamping units, the yarn conveying and clamping units are symmetrically arranged on one side of the weft laying unit, the weft selecting unit is horizontally arranged above the yarn conveying and clamping units on the two sides, and the weft selecting unit comprises a mounting frame. A plurality of line selection frames arranged in the weft selection unit and traction mechanisms on the line selection frames are matched with a line clamping plate limiting mechanism and a line clamping plate mechanism, rapid and accurate selection and switching of multiple yarns are achieved, the weft selection efficiency and accuracy are improved, a trolley assembly in the weft laying unit is in linkage design through a line pressing frame, a line pressing plate and a line clamping mechanism, and the weft laying efficiency is improved. According to the yarn conveying and clamping unit, reliable pressing and clamping of the yarn are achieved, yarn displacement in the weft laying process is avoided, the yarn conveying and clamping unit is matched with an adjustable clamping piece in a chain transmission mode, continuous and stable conveying of the yarn is achieved, and accurate control over the clamping state is achieved through an adjusting assembly and a driving assembly.

A bicycle with an electric pedal assist motor capable of driving a chainring independent of cranks includes wheel speed sensors and crank cadence sensors. The wheel speed sensors and the crank cadence sensors measure wheel speed and crank cadence, respectively, and provide the measured wheel speed and crank cadence to a controller of the bicycle. The controller is configured to instruct an assist motor to activate based on the measured wheel speed and / or the measured crank cadence.

The invention discloses a safety monitoring system of a high transverse support system for cable-stayed bridge man-shaped tower column construction, and relates to the technical field of bridge construction monitoring, the system comprises a creeping formwork integrated sensing module used for generating a point cloud model by using a mechanical arm integrated on a hydraulic creeping formwork platform and a laser radar scanning tower column curved surface, combining with a preset building information model coordinate, adaptively adjusting the mounting posture of the sensor, and outputting the mounting coordinate position of the sensor; the optical fiber sensing network module is used for collecting original strain and temperature data by using a distributed optical fiber sensor deployed along a main stress path of the support truss; an inertial navigation fusion positioning module; a digital twinning early warning module; and an edge calculation relay module. According to the invention, a full-process monitoring chain from data acquisition to risk early warning is constructed through cooperation of multiple modules, full-period and multi-dimensional dynamic control of construction of the human-shaped tower column high transverse support system is realized, and timely perception and overall control of potential risks are ensured.

The invention relates to the technical field of conveying equipment, in particular to a chain type scraper conveyor which comprises a rack, a chain, a scraping mechanism, a conveying belt and a synchronizing mechanism. Through cooperation of the sliding blocks and the sliding grooves at the two ends of the scraping plate, the scraping plate is perpendicular to the chain all the time, and the problem that in the prior art, due to the fact that the chain of a scraper conveyor is stressed, the scraping plate deviates, and abrasion is generated between the scraping plate and a shell is solved; in addition, relative movement between the bearing table and the scraping plate is changed into synchronous movement between the bearing table and the scraping plate, and abrasion caused by friction between the scraping plate and the bearing table is avoided. By arranging the synchronizing mechanism, the conveyor can adjust the relative motion relation between the scraping plate and the conveying belt according to different working conditions, and when materials are heavy, the scraping plate moves relative to the conveying belt to push the materials on the conveying belt; when the materials are light, the conveying belt and the scraping plate move synchronously, abrasion between the conveying belt and the scraping plate and bending abrasion of the conveying belt are reduced, and the service life is further prolonged.

The invention relates to the technical field of pipe welding, and discloses special welding equipment for an inner pipe connection type heat insulation oil casing, which comprises a welding table, a pipeline clamping mechanism is arranged at the top of the welding table, and the pipeline clamping mechanism comprises two rotating rings. During oil pipe machining, two oil pipes penetrate through the fixing rings to be connected, the electric telescopic rods drive the V-shaped clamping plates to clamp the oil pipes, and the driving motors enable the supporting rollers to support the oil pipes through the gears and the lead screws. The adjusting motor is matched with a related structure, so that the grinding wheel and the arc-shaped grinding piece are attached to oil pipes with different diameters. The grinding motor and the rotating motor work cooperatively to comprehensively grind the oil pipe, during welding, the oil pipe rotates at a constant speed to achieve uniform welding, and after welding, the grinding wheel and the arc-shaped grinding piece clean weld joints. In addition, in the polishing process of the equipment, a cleaning brush is driven to clean a polishing part through transmission of a gear and a chain, the polishing and welding quality is guaranteed, and the machining efficiency is improved.

A steerable instrument has a tube (3) extending in a longitudinal direction. The steerable instrument has a proximal end and a deflectable distal end. The tube (3) has a steering wire (16(j); 120, 130) which is made from the tube (3), separated by a slotted structure from the remainder of the tube (3), attached to the deflectable distal end and is movable in a longitudinal direction of the tube (3) such as to deflect the deflectable distal end The steering wire (16(j); 120, 130) has flexible portion located in a flexible zone (13) of the steerable instrument which is implemented by a series of adjacent chain links (1301(k); 1401(k); 1501(k); 1601(k); 1701(k)).

A chainless hybrid electric bicycle includes a bicycle body. A generator, a battery pack, a driving motor and a manual switch are mounted on the bicycle body. The generator is coaxially mounted with the pedal transmission unit, so that the generator generates an electric power when the rider works the pedals. The battery pack is electrically connected to the generator for storing the electric power generated by the generator. The driving motor drives the wheels of the bicycle body to run. The rider selects the electric power from the generator or the battery pack through the manual switch to drive the driving motor to run, which in turn drives the bicycle body to move forward. The chainless hybrid electric bicycle has the advantage of a hybrid power drive system, without using traditional mechanical transmission components such as chains and chainrings.

A chain binder to connect and apply tension to chains, straps, or the like used to secure cargo on any type of platform or vehicle. The chain binder includes a lever body; a first side portion; a second side portion; and gears that effectuate two modes of operation. Namely, a power driven mode of operation or a manual lever mode of operation. Rotations of the gears causes hooks or connectors, via movement of eye-bolts, toward each other to place tension in the chains or strap. Opposite rotations of the gears causes hooks or connectors, via movement of eye-bolts, away from each other to relax the chains or strap. If components are damages during use, they may be replaced on an as-needed basis to reduce operational cost of the chain binder since the entire binder does not need replaced when only one component fails or is damaged.

The invention discloses a suspension conveying system for glass processing feeding, and relates to the technical field of glass processing, the suspension conveying system comprises a chain, a track is arranged right above the chain, the chain is fixedly connected with a plurality of connecting shafts, and the bottom of each connecting shaft is provided with a glass placing assembly; through cooperation of the clamping plates, the glass needing to be conveyed is placed on the base and obliquely leans against the base, the upper half portions of the clamping plates are kept perpendicular while the clamping plates gradually get close to the base, the two sides of the glass are clamped, and compared with the mode that the glass is directly placed on a conveying frame, friction between the glass and the placing position can be avoided, so that the glass is protected, and meanwhile the glass conveying efficiency is improved. Noise generated by hanging the transportation system is reduced; the air bag is matched with the second hollow wheel, the first hollow wheel and the track are lubricated, the lubricating state is kept between the first hollow wheel and the track, noise generated in the suspension conveying system is reduced, and the conveying efficiency of the suspension conveying system is improved.

A chainring assembly includes a chainring carrier adapted to be coupled to a crank arm. The chainring carrier is rotatable about a rotation axis and includes an outer periphery having carrier threads. A chainring structure includes an inner periphery having chainring threads and an outer periphery comprising a plurality of teeth. The inner periphery of the chainring structure is threadably engaged with the outer periphery of the chainring carrier. In one embodiment, a power meter device includes a body having a torque input section and a torque output section, with the torque output section including an outer periphery having threads adapted to be coupled to a chainring structure.

The invention relates to the technical field of wiring terminal welding, and discloses wiring terminal automatic precision welding equipment which comprises a welding table, a mounting frame is arranged at the upper end of the welding table, a welding mechanism is fixed to the mounting frame, a lifting rod is movably arranged at the lower end of the welding mechanism, and a welding head is connected to the lower end of the lifting rod. A tool groove is formed in the upper end face of the welding table and located below the welding head. According to the automatic precise welding equipment for the wiring terminal, by means of power generated when a rotating rod moves and through turning transmission of two sets of bevel gears, a large chain wheel drives a rotating shaft on a small chain wheel to rotate at a high speed through a chain, a plurality of sets of brush heads on the periphery of a rotating table sequentially work, and brush bristles are used for brushing part of rosin paste when passing through a paste plate; and then the bristles carrying the rosin paste are in contact with the tin wire which just moves slowly and linearly in the wire storage pipe in the downward movement process, the rosin paste is wiped to the surface of the tin wire, and the automatic coating effect is achieved.

The invention relates to the technical field of window opener chains, in particular to a window opener chain strength testing device based on electric window opener production and a testing method.The window opener chain strength testing device comprises a frame and a testing window opener, a simulation window is arranged on one side of the frame, and the top of the simulation window is fixedly connected with a rotating shaft rotationally connected with the frame; a window opener chain is mounted in the test window opener, one end of the window opener chain is fixedly connected with the simulation window through a connecting seat, a mounting cylinder is arranged in the frame, the outer surface of the mounting cylinder is in sliding connection with a rotating ring, one end of the rotating ring is fixedly connected with a pull handle rotationally connected with the simulation window, and the other end of the rotating ring is fixedly connected with the test window opener. A mounting cylinder is arranged in the frame, a resistance assembly is arranged in the mounting cylinder, a straight plate is arranged on one side of the frame, a pressure applying plate for applying resistance to the simulation window is arranged at the bottom of the straight plate, sliding seats are slidably connected to the two ends of the frame, and pressure assemblies acting on the straight plate are arranged on one sides of the two sliding seats.

An embodiment is directed to a touch bar exit device for use on an exit door. The touch bar exit device include a touch bar and a link bar which moves as the touch bar is depressed. A return mechanism is mounted on the link bar. A damper mechanism is mounted on the link bar. The damper mechanism limits the travel of the link bar and the touch bar to dampen the sound of the touch bar exit device when the touch bar is depressed.

The invention belongs to the technical field of drag chain assembling, and particularly relates to automatic drag chain assembling equipment and method.The automatic drag chain assembling equipment comprises a base, a feeding device is arranged on one side of the base, a workbench is fixedly arranged at the top of the base, an assembling groove is fixedly connected to the top of the workbench, and a feeding groove is directly and fixedly formed between the assembling groove and the feeding device; a conveying device is fixedly arranged at the top of the assembling groove; the chain links on the assembling blocks are centered and clamped, and meanwhile, the chain links on the limiters in the assembling grooves are centered and clamped, so that the previous chain links and the next chain links are located on the same horizontal straight line, and the chain links are prevented from deviating when being pushed by the crimping columns; the problems that the chain links cannot be completely embedded into one end of the drag chain and the stability of the drag chain formed after clamping is reduced due to the fact that the chain links cannot be accurately aligned and fixed to the preset clamping positions are solved, the butt joint precision of the chain links is improved, the stability of the drag chain formed after butt joint is guaranteed, and the yield of the produced drag chain is also improved.

A handling fork and a handling device. The handling fork comprises a bottom plate (10), two support plate assemblies (11), a telescopic fork driving assembly (12), a sliding plate extending and retracting and suction cup assembly (13), and two push rod assemblies (14); the support plate assemblies (11), the telescopic fork driving assembly (12), the sliding plate extending and retracting and suction cup assembly (13), and the push rod assemblies (14) are respectively arranged on the bottom plate (10); the telescopic fork driving assembly (12) is in chain connection with the sliding plate extending and retracting and suction cup assembly (13); the two push rod assemblies (14) are respectively located on two sides of the sliding plate extending and retracting and suction cup assembly (13) and are slidably connected to the sliding plate extending and retracting and suction cup assembly (13); the two support plate assemblies (11) are respectively located on two sides of the sliding plate extending and retracting and suction cup assembly (13); the sliding plate extending and retracting and suction cup assembly (13) is driven by the telescopic fork driving assembly (12) to drive the push rod assemblies (14) to extend along a preset direction, suctions a material box (03) to the push rod assemblies (14), and then drives the push rod assemblies (14) to reversely retract, so that the material box (03) is carried on the support plate assemblies (11). According to the handling fork and the handling device, the telescopic fork driving assembly and the sliding plate extending and retracting and suction cup assembly are controlled to handle material boxes, so that high safety is achieved.

The invention belongs to the technical field of optical fiber laser welding, and particularly relates to optical fiber laser welding equipment which comprises a rack, a conveying mechanism used for conveying a battery module is arranged in the rack, an XYZ-axis moving mechanism is installed on one side of the rack, a laser welding device is installed on the XYZ-axis moving mechanism, and a conveying belt is connected to one side of the end of the rack. The conveying mechanism comprises two sets of transmission shafts, the two sets of transmission shafts are rotationally installed in the rack, chain wheels are installed on the two sets of transmission shafts, the two sets of chain wheels are meshed with a chain, a plurality of sets of shifting forks used for containing battery modules are arranged around the chain, and one ends of the shifting forks are fixedly connected with the chain. According to the battery module welding device, feeding, welding and discharging of the battery module can be conducted at the same time, the automation rate of the device is increased, meanwhile, the battery module can be continuously welded, and the welding efficiency of the battery module is improved.

A slide-out arrangement (10) for a vehicle (100) allows a slide-out box (20) to be extended for the purpose of enlarging the vehicle interior. A slide-out arrangement (10) comprises a vehicle-side assembly (40) for mounting on the chassis of the vehicle (100) and a slide-out-side assembly (50) for mounting on a slide-out box (20), and further includes a drive system (60) by means of which the vehicle-side assembly (40) and the slide-out-side assembly (50) are movable relative to each other. It is proposed that the drive system (60) comprise a push chain drive with at least one double chain set (64) which has at least two chain strands (66A, 66B) that are independently fed to a contact area when the double chain set is extended, and which are each designed as unidirectionally articulated chain strands (66A, 66B).The at least two chain strands (66A, 66B) come into contact with each other in the contact area (62) when the chain strands (66A, 66B) are extended, in such a way that they can be extended as a common chain assembly (68) supporting or holding each other.

A foldable pushing chain type lifting platform belongs to the technical field of pushing chains and lifting platforms and comprises a meshed pushing chain system, an X-axis limiting mechanism and a Y-axis limiting mechanism, one side of the bottom of the meshed pushing chain system is fixedly connected with a base, the meshed pushing chain system outputs pushing chains upwards in the Z-axis direction, and the X-axis limiting mechanism and the Y-axis limiting mechanism are fixedly connected with the base. The top end of the pushing chain is fixedly connected with a top table used for bearing a lifted object, an X-axis limiting mechanism is further connected between the top table and the base, and the side, away from the meshing type pushing chain system, of the X-axis limiting mechanism is connected with a Y-axis limiting mechanism. The X-axis limiting mechanism is of a folding arm structure which only rotates around the X axis and limits the pushing chain and the top table to move in the X-axis direction. According to the invention, the pushing chain is used as a driving part, and the device has the advantages of high speed, large bearing capacity, high precision, long maintenance period, multi-point control, good stability, low initial height, large stroke, small occupied space and strong environmental adaptability.